Kiln for drying lumber



(No Model.)r

A. T. BEMIS.

KILN FOR DRYING LUMBER. No. 472,600. Patented Apr. 412, 1892.

UNITED STATES- PATENT. OFFICE.

' ALBERT T. BEMIS, OF LOUISVILLE, KENTUCKY.

KILN FOR DRYING'LUMBER.

SPECIFICATION forming part of Letters Patent No. 472,600, dated April 12, 1892.

Application'iiled September 24, 1891l Serial No. 406,678. (No model.)

To all whom, it may concern.-

Be it known that I, ALBERT T. BEMIS,a citizen of the United States, residing at Louisville, in the county of Jeiferson and State of Kentucky, have invented certain new and useful Improvements in Kilns for Drying Lumber, &c. and I do declare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the 'letters of reference marked thereon, which form a part of this specification.

This invention relates to certain new and useful improvements in drying-kilns for lumber and the like; and it has for its objects, among others, to provide for the proper holding of the heat near the bottom of the kiln and for conveying it out where it will not annoy and interfere with the workmen in loading the cars.

Heretofore it has been proposed to provide an opening in the iioor at the green end of the kiln or chamber for the escape of the .moist air, which is quite objectionable for the reason that in a short time it will rot the building, and where three or more rooms are con nected together the middle rooms do not get the required ventilation, which causes the lumber therein to mold and stain and decay, which is of course a great detriment to its market value. Again, it has been proposed to have the doors up about six inches from the floor, and the moist air escaping from the kiln makes it almost impossible for the men to work loading the cars on the platform. It has also been proposed to provide a stack or opening from the ceiling at the green end of the kiln. This has proved very unsatisfactory on account of its natural tendency to draw all the heat from the kiln unless a curtain is provided, which is always getting out of order and in a short time is torn down by the cars rubbing against it. I overcome these difficulties by the construction and arrangement of parts shown in the accompanying drawings.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be specifically defined by the appended claims.

The invention is clearly illustrated in the Y proved form of construction.

accompanying drawings, which, with the letters of reference marked thereon, form a part of this specification, and in which Figure l is an end view of a drying-kiln constructed in accordance with myinvention with a portion broken away. Fig. 2 is a central vertical longitudinal section through the same.

Like letters of 'reference indicate like parts in both Views where they occur.

Referring now to the details of the drawings by letter, A designates a portion of the building or kiln, which, except as hereinafter specified, may be of any well-known or ap- It is shown as but one story in height and suitablysupported.

B are the rails or tracks upon which the cars C are designed to travel in the usual manner. These cars may be of any of the wellknown or approved styles and the lumber is piled thereon in the usual way. At the green end, or the end where the cars are loaded into the building, I provide a movable door E, which is designed to close the said end. This door maybe arranged to slide horizontally in any suitable manner; but it is preferred to arrange it to slide vertically in suitable guides, as shown, and in the present instance it is shown as suspended from the cords or chains F, which are passed over the pulleys G, carried by shafts suitably journaled at the upper ends of the uprights G and having theirends attached to the weights H, which may be connected by the cross-bar H, as seen in Fig. 1. This door is provided near its lower edge with an opening ct, which communicates with the stack or vertical conduit b, which is formed by being attached to the outer face of the door at a distance therefrom, as seen best in Fig. 2, to provide the vertical passage-way or opening, as seen. This conduit is closed at the bottom, as shown.

The operation will be readily understood. The course of the air is indicated by the arrows. Vhen it is desired to place a fresh car in the building, the door, with its conduit, is moved and the car moved into the kiln. The door is then closed and the air is forced to traverse in the direction of the arrows down to the bottom of the chamber, and thence through the opening at the bottom of the door and up the conduit and out, as seen in Fig. 2.

IOO

toni, connterbalance-Wcights fortlie door, and a conduit scoured on and permanently fixed 15 parallel with the outer face of the door, with its upper end always open, communicating with the said opening and closed at its bottom, as shown and described.

In testimony whereof I affix my signature in zo presence of two Witnesses.

ALBERT T. BEMIS. Witnesses:

Ro. T. ELLIOTT, J. S. WOODS. 

